The Ontario Building Code | Downspouts
9.26.18.2. Downspouts
(1) Where downspouts are provided and are not connected to a sewer, extensions shall be provided to carry rainwater away from the buildingin a manner that will prevent soil erosion.
Section 9.27. Cladding
9.27.1. application
In Plain Language
Downspouts must meet the requirements set out in this article, directing roof runoff safely away from the roof edge and building.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.